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fa619a77 HR |
1 | /* |
2 | * Copyright (c) 2005 Intel Inc. All rights reserved. | |
618a3c03 | 3 | * Copyright (c) 2005-2006 Voltaire, Inc. All rights reserved. |
fa619a77 HR |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | * | |
33 | * $Id: mad_rmpp.c 1921 2005-03-02 22:58:44Z sean.hefty $ | |
34 | */ | |
35 | ||
fa619a77 HR |
36 | #include "mad_priv.h" |
37 | #include "mad_rmpp.h" | |
38 | ||
39 | enum rmpp_state { | |
40 | RMPP_STATE_ACTIVE, | |
41 | RMPP_STATE_TIMEOUT, | |
42 | RMPP_STATE_COMPLETE | |
43 | }; | |
44 | ||
45 | struct mad_rmpp_recv { | |
46 | struct ib_mad_agent_private *agent; | |
47 | struct list_head list; | |
48 | struct work_struct timeout_work; | |
49 | struct work_struct cleanup_work; | |
1b52fa98 | 50 | struct completion comp; |
fa619a77 HR |
51 | enum rmpp_state state; |
52 | spinlock_t lock; | |
53 | atomic_t refcount; | |
54 | ||
55 | struct ib_ah *ah; | |
56 | struct ib_mad_recv_wc *rmpp_wc; | |
57 | struct ib_mad_recv_buf *cur_seg_buf; | |
58 | int last_ack; | |
59 | int seg_num; | |
60 | int newwin; | |
75ab1344 | 61 | int repwin; |
fa619a77 | 62 | |
97f52eb4 | 63 | __be64 tid; |
fa619a77 HR |
64 | u32 src_qp; |
65 | u16 slid; | |
66 | u8 mgmt_class; | |
67 | u8 class_version; | |
68 | u8 method; | |
69 | }; | |
70 | ||
1b52fa98 SH |
71 | static inline void deref_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
72 | { | |
73 | if (atomic_dec_and_test(&rmpp_recv->refcount)) | |
74 | complete(&rmpp_recv->comp); | |
75 | } | |
76 | ||
fa619a77 HR |
77 | static void destroy_rmpp_recv(struct mad_rmpp_recv *rmpp_recv) |
78 | { | |
1b52fa98 SH |
79 | deref_rmpp_recv(rmpp_recv); |
80 | wait_for_completion(&rmpp_recv->comp); | |
fa619a77 HR |
81 | ib_destroy_ah(rmpp_recv->ah); |
82 | kfree(rmpp_recv); | |
83 | } | |
84 | ||
85 | void ib_cancel_rmpp_recvs(struct ib_mad_agent_private *agent) | |
86 | { | |
87 | struct mad_rmpp_recv *rmpp_recv, *temp_rmpp_recv; | |
88 | unsigned long flags; | |
89 | ||
90 | spin_lock_irqsave(&agent->lock, flags); | |
91 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { | |
92 | cancel_delayed_work(&rmpp_recv->timeout_work); | |
93 | cancel_delayed_work(&rmpp_recv->cleanup_work); | |
94 | } | |
95 | spin_unlock_irqrestore(&agent->lock, flags); | |
96 | ||
97 | flush_workqueue(agent->qp_info->port_priv->wq); | |
98 | ||
99 | list_for_each_entry_safe(rmpp_recv, temp_rmpp_recv, | |
100 | &agent->rmpp_list, list) { | |
101 | list_del(&rmpp_recv->list); | |
102 | if (rmpp_recv->state != RMPP_STATE_COMPLETE) | |
103 | ib_free_recv_mad(rmpp_recv->rmpp_wc); | |
104 | destroy_rmpp_recv(rmpp_recv); | |
105 | } | |
106 | } | |
107 | ||
f36e1793 | 108 | static void format_ack(struct ib_mad_send_buf *msg, |
fe9e08e1 SH |
109 | struct ib_rmpp_mad *data, |
110 | struct mad_rmpp_recv *rmpp_recv) | |
111 | { | |
f36e1793 | 112 | struct ib_rmpp_mad *ack = msg->mad; |
fe9e08e1 SH |
113 | unsigned long flags; |
114 | ||
f36e1793 | 115 | memcpy(ack, &data->mad_hdr, msg->hdr_len); |
fe9e08e1 SH |
116 | |
117 | ack->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
118 | ack->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ACK; | |
119 | ib_set_rmpp_flags(&ack->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
120 | ||
121 | spin_lock_irqsave(&rmpp_recv->lock, flags); | |
122 | rmpp_recv->last_ack = rmpp_recv->seg_num; | |
123 | ack->rmpp_hdr.seg_num = cpu_to_be32(rmpp_recv->seg_num); | |
124 | ack->rmpp_hdr.paylen_newwin = cpu_to_be32(rmpp_recv->newwin); | |
125 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
126 | } | |
127 | ||
128 | static void ack_recv(struct mad_rmpp_recv *rmpp_recv, | |
129 | struct ib_mad_recv_wc *recv_wc) | |
130 | { | |
131 | struct ib_mad_send_buf *msg; | |
f36e1793 | 132 | int ret, hdr_len; |
fe9e08e1 | 133 | |
618a3c03 | 134 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
fe9e08e1 | 135 | msg = ib_create_send_mad(&rmpp_recv->agent->agent, recv_wc->wc->src_qp, |
f36e1793 JM |
136 | recv_wc->wc->pkey_index, 1, hdr_len, |
137 | 0, GFP_KERNEL); | |
fe9e08e1 SH |
138 | if (!msg) |
139 | return; | |
140 | ||
f36e1793 | 141 | format_ack(msg, (struct ib_rmpp_mad *) recv_wc->recv_buf.mad, rmpp_recv); |
34816ad9 SH |
142 | msg->ah = rmpp_recv->ah; |
143 | ret = ib_post_send_mad(msg, NULL); | |
fe9e08e1 SH |
144 | if (ret) |
145 | ib_free_send_mad(msg); | |
146 | } | |
147 | ||
7cc656ef RD |
148 | static struct ib_mad_send_buf *alloc_response_msg(struct ib_mad_agent *agent, |
149 | struct ib_mad_recv_wc *recv_wc) | |
fe9e08e1 | 150 | { |
7cc656ef | 151 | struct ib_mad_send_buf *msg; |
fe9e08e1 | 152 | struct ib_ah *ah; |
f36e1793 | 153 | int hdr_len; |
fe9e08e1 SH |
154 | |
155 | ah = ib_create_ah_from_wc(agent->qp->pd, recv_wc->wc, | |
156 | recv_wc->recv_buf.grh, agent->port_num); | |
157 | if (IS_ERR(ah)) | |
7cc656ef | 158 | return (void *) ah; |
fe9e08e1 | 159 | |
618a3c03 | 160 | hdr_len = ib_get_mad_data_offset(recv_wc->recv_buf.mad->mad_hdr.mgmt_class); |
7cc656ef RD |
161 | msg = ib_create_send_mad(agent, recv_wc->wc->src_qp, |
162 | recv_wc->wc->pkey_index, 1, | |
f36e1793 | 163 | hdr_len, 0, GFP_KERNEL); |
7cc656ef | 164 | if (IS_ERR(msg)) |
fe9e08e1 | 165 | ib_destroy_ah(ah); |
7cc656ef RD |
166 | else |
167 | msg->ah = ah; | |
168 | ||
169 | return msg; | |
fe9e08e1 SH |
170 | } |
171 | ||
75ab1344 SH |
172 | static void ack_ds_ack(struct ib_mad_agent_private *agent, |
173 | struct ib_mad_recv_wc *recv_wc) | |
174 | { | |
175 | struct ib_mad_send_buf *msg; | |
176 | struct ib_rmpp_mad *rmpp_mad; | |
177 | int ret; | |
178 | ||
179 | msg = alloc_response_msg(&agent->agent, recv_wc); | |
180 | if (IS_ERR(msg)) | |
181 | return; | |
182 | ||
183 | rmpp_mad = msg->mad; | |
184 | memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); | |
185 | ||
186 | rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
187 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
188 | rmpp_mad->rmpp_hdr.seg_num = 0; | |
189 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(1); | |
190 | ||
191 | ret = ib_post_send_mad(msg, NULL); | |
192 | if (ret) { | |
193 | ib_destroy_ah(msg->ah); | |
194 | ib_free_send_mad(msg); | |
195 | } | |
196 | } | |
197 | ||
34816ad9 | 198 | void ib_rmpp_send_handler(struct ib_mad_send_wc *mad_send_wc) |
fe9e08e1 | 199 | { |
34816ad9 SH |
200 | struct ib_rmpp_mad *rmpp_mad = mad_send_wc->send_buf->mad; |
201 | ||
202 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_ACK) | |
203 | ib_destroy_ah(mad_send_wc->send_buf->ah); | |
204 | ib_free_send_mad(mad_send_wc->send_buf); | |
fe9e08e1 SH |
205 | } |
206 | ||
207 | static void nack_recv(struct ib_mad_agent_private *agent, | |
208 | struct ib_mad_recv_wc *recv_wc, u8 rmpp_status) | |
209 | { | |
210 | struct ib_mad_send_buf *msg; | |
211 | struct ib_rmpp_mad *rmpp_mad; | |
fe9e08e1 SH |
212 | int ret; |
213 | ||
7cc656ef RD |
214 | msg = alloc_response_msg(&agent->agent, recv_wc); |
215 | if (IS_ERR(msg)) | |
fe9e08e1 SH |
216 | return; |
217 | ||
34816ad9 | 218 | rmpp_mad = msg->mad; |
f36e1793 | 219 | memcpy(rmpp_mad, recv_wc->recv_buf.mad, msg->hdr_len); |
fe9e08e1 SH |
220 | |
221 | rmpp_mad->mad_hdr.method ^= IB_MGMT_METHOD_RESP; | |
222 | rmpp_mad->rmpp_hdr.rmpp_version = IB_MGMT_RMPP_VERSION; | |
223 | rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_ABORT; | |
224 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); | |
225 | rmpp_mad->rmpp_hdr.rmpp_status = rmpp_status; | |
226 | rmpp_mad->rmpp_hdr.seg_num = 0; | |
227 | rmpp_mad->rmpp_hdr.paylen_newwin = 0; | |
228 | ||
34816ad9 SH |
229 | ret = ib_post_send_mad(msg, NULL); |
230 | if (ret) { | |
231 | ib_destroy_ah(msg->ah); | |
232 | ib_free_send_mad(msg); | |
233 | } | |
fe9e08e1 SH |
234 | } |
235 | ||
fa619a77 HR |
236 | static void recv_timeout_handler(void *data) |
237 | { | |
238 | struct mad_rmpp_recv *rmpp_recv = data; | |
239 | struct ib_mad_recv_wc *rmpp_wc; | |
240 | unsigned long flags; | |
241 | ||
242 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); | |
243 | if (rmpp_recv->state != RMPP_STATE_ACTIVE) { | |
244 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
245 | return; | |
246 | } | |
247 | rmpp_recv->state = RMPP_STATE_TIMEOUT; | |
248 | list_del(&rmpp_recv->list); | |
249 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
250 | ||
fa619a77 | 251 | rmpp_wc = rmpp_recv->rmpp_wc; |
fe9e08e1 | 252 | nack_recv(rmpp_recv->agent, rmpp_wc, IB_MGMT_RMPP_STATUS_T2L); |
fa619a77 HR |
253 | destroy_rmpp_recv(rmpp_recv); |
254 | ib_free_recv_mad(rmpp_wc); | |
255 | } | |
256 | ||
257 | static void recv_cleanup_handler(void *data) | |
258 | { | |
259 | struct mad_rmpp_recv *rmpp_recv = data; | |
260 | unsigned long flags; | |
261 | ||
262 | spin_lock_irqsave(&rmpp_recv->agent->lock, flags); | |
263 | list_del(&rmpp_recv->list); | |
264 | spin_unlock_irqrestore(&rmpp_recv->agent->lock, flags); | |
265 | destroy_rmpp_recv(rmpp_recv); | |
266 | } | |
267 | ||
268 | static struct mad_rmpp_recv * | |
269 | create_rmpp_recv(struct ib_mad_agent_private *agent, | |
270 | struct ib_mad_recv_wc *mad_recv_wc) | |
271 | { | |
272 | struct mad_rmpp_recv *rmpp_recv; | |
273 | struct ib_mad_hdr *mad_hdr; | |
274 | ||
275 | rmpp_recv = kmalloc(sizeof *rmpp_recv, GFP_KERNEL); | |
276 | if (!rmpp_recv) | |
277 | return NULL; | |
278 | ||
279 | rmpp_recv->ah = ib_create_ah_from_wc(agent->agent.qp->pd, | |
280 | mad_recv_wc->wc, | |
281 | mad_recv_wc->recv_buf.grh, | |
282 | agent->agent.port_num); | |
283 | if (IS_ERR(rmpp_recv->ah)) | |
284 | goto error; | |
285 | ||
286 | rmpp_recv->agent = agent; | |
1b52fa98 | 287 | init_completion(&rmpp_recv->comp); |
fa619a77 HR |
288 | INIT_WORK(&rmpp_recv->timeout_work, recv_timeout_handler, rmpp_recv); |
289 | INIT_WORK(&rmpp_recv->cleanup_work, recv_cleanup_handler, rmpp_recv); | |
290 | spin_lock_init(&rmpp_recv->lock); | |
291 | rmpp_recv->state = RMPP_STATE_ACTIVE; | |
292 | atomic_set(&rmpp_recv->refcount, 1); | |
293 | ||
294 | rmpp_recv->rmpp_wc = mad_recv_wc; | |
295 | rmpp_recv->cur_seg_buf = &mad_recv_wc->recv_buf; | |
296 | rmpp_recv->newwin = 1; | |
297 | rmpp_recv->seg_num = 1; | |
298 | rmpp_recv->last_ack = 0; | |
75ab1344 | 299 | rmpp_recv->repwin = 1; |
fa619a77 HR |
300 | |
301 | mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; | |
302 | rmpp_recv->tid = mad_hdr->tid; | |
303 | rmpp_recv->src_qp = mad_recv_wc->wc->src_qp; | |
304 | rmpp_recv->slid = mad_recv_wc->wc->slid; | |
305 | rmpp_recv->mgmt_class = mad_hdr->mgmt_class; | |
306 | rmpp_recv->class_version = mad_hdr->class_version; | |
307 | rmpp_recv->method = mad_hdr->method; | |
308 | return rmpp_recv; | |
309 | ||
310 | error: kfree(rmpp_recv); | |
311 | return NULL; | |
312 | } | |
313 | ||
fa619a77 HR |
314 | static struct mad_rmpp_recv * |
315 | find_rmpp_recv(struct ib_mad_agent_private *agent, | |
316 | struct ib_mad_recv_wc *mad_recv_wc) | |
317 | { | |
318 | struct mad_rmpp_recv *rmpp_recv; | |
319 | struct ib_mad_hdr *mad_hdr = &mad_recv_wc->recv_buf.mad->mad_hdr; | |
320 | ||
321 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { | |
322 | if (rmpp_recv->tid == mad_hdr->tid && | |
323 | rmpp_recv->src_qp == mad_recv_wc->wc->src_qp && | |
324 | rmpp_recv->slid == mad_recv_wc->wc->slid && | |
325 | rmpp_recv->mgmt_class == mad_hdr->mgmt_class && | |
326 | rmpp_recv->class_version == mad_hdr->class_version && | |
327 | rmpp_recv->method == mad_hdr->method) | |
328 | return rmpp_recv; | |
329 | } | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | static struct mad_rmpp_recv * | |
334 | acquire_rmpp_recv(struct ib_mad_agent_private *agent, | |
335 | struct ib_mad_recv_wc *mad_recv_wc) | |
336 | { | |
337 | struct mad_rmpp_recv *rmpp_recv; | |
338 | unsigned long flags; | |
339 | ||
340 | spin_lock_irqsave(&agent->lock, flags); | |
341 | rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); | |
342 | if (rmpp_recv) | |
343 | atomic_inc(&rmpp_recv->refcount); | |
344 | spin_unlock_irqrestore(&agent->lock, flags); | |
345 | return rmpp_recv; | |
346 | } | |
347 | ||
348 | static struct mad_rmpp_recv * | |
349 | insert_rmpp_recv(struct ib_mad_agent_private *agent, | |
350 | struct mad_rmpp_recv *rmpp_recv) | |
351 | { | |
352 | struct mad_rmpp_recv *cur_rmpp_recv; | |
353 | ||
354 | cur_rmpp_recv = find_rmpp_recv(agent, rmpp_recv->rmpp_wc); | |
355 | if (!cur_rmpp_recv) | |
356 | list_add_tail(&rmpp_recv->list, &agent->rmpp_list); | |
357 | ||
358 | return cur_rmpp_recv; | |
359 | } | |
360 | ||
fa619a77 HR |
361 | static inline int get_last_flag(struct ib_mad_recv_buf *seg) |
362 | { | |
363 | struct ib_rmpp_mad *rmpp_mad; | |
364 | ||
365 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; | |
366 | return ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & IB_MGMT_RMPP_FLAG_LAST; | |
367 | } | |
368 | ||
369 | static inline int get_seg_num(struct ib_mad_recv_buf *seg) | |
370 | { | |
371 | struct ib_rmpp_mad *rmpp_mad; | |
372 | ||
373 | rmpp_mad = (struct ib_rmpp_mad *) seg->mad; | |
374 | return be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); | |
375 | } | |
376 | ||
377 | static inline struct ib_mad_recv_buf * get_next_seg(struct list_head *rmpp_list, | |
378 | struct ib_mad_recv_buf *seg) | |
379 | { | |
380 | if (seg->list.next == rmpp_list) | |
381 | return NULL; | |
382 | ||
383 | return container_of(seg->list.next, struct ib_mad_recv_buf, list); | |
384 | } | |
385 | ||
386 | static inline int window_size(struct ib_mad_agent_private *agent) | |
387 | { | |
388 | return max(agent->qp_info->recv_queue.max_active >> 3, 1); | |
389 | } | |
390 | ||
391 | static struct ib_mad_recv_buf * find_seg_location(struct list_head *rmpp_list, | |
392 | int seg_num) | |
393 | { | |
3cd96564 | 394 | struct ib_mad_recv_buf *seg_buf; |
fa619a77 HR |
395 | int cur_seg_num; |
396 | ||
397 | list_for_each_entry_reverse(seg_buf, rmpp_list, list) { | |
398 | cur_seg_num = get_seg_num(seg_buf); | |
399 | if (seg_num > cur_seg_num) | |
400 | return seg_buf; | |
401 | if (seg_num == cur_seg_num) | |
402 | break; | |
403 | } | |
404 | return NULL; | |
405 | } | |
406 | ||
407 | static void update_seg_num(struct mad_rmpp_recv *rmpp_recv, | |
408 | struct ib_mad_recv_buf *new_buf) | |
409 | { | |
410 | struct list_head *rmpp_list = &rmpp_recv->rmpp_wc->rmpp_list; | |
411 | ||
412 | while (new_buf && (get_seg_num(new_buf) == rmpp_recv->seg_num + 1)) { | |
413 | rmpp_recv->cur_seg_buf = new_buf; | |
414 | rmpp_recv->seg_num++; | |
415 | new_buf = get_next_seg(rmpp_list, new_buf); | |
416 | } | |
417 | } | |
418 | ||
419 | static inline int get_mad_len(struct mad_rmpp_recv *rmpp_recv) | |
420 | { | |
421 | struct ib_rmpp_mad *rmpp_mad; | |
422 | int hdr_size, data_size, pad; | |
423 | ||
424 | rmpp_mad = (struct ib_rmpp_mad *)rmpp_recv->cur_seg_buf->mad; | |
425 | ||
618a3c03 | 426 | hdr_size = ib_get_mad_data_offset(rmpp_mad->mad_hdr.mgmt_class); |
fa619a77 | 427 | data_size = sizeof(struct ib_rmpp_mad) - hdr_size; |
f2065e42 HR |
428 | pad = IB_MGMT_RMPP_DATA - be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); |
429 | if (pad > IB_MGMT_RMPP_DATA || pad < 0) | |
fa619a77 HR |
430 | pad = 0; |
431 | ||
432 | return hdr_size + rmpp_recv->seg_num * data_size - pad; | |
433 | } | |
434 | ||
435 | static struct ib_mad_recv_wc * complete_rmpp(struct mad_rmpp_recv *rmpp_recv) | |
436 | { | |
437 | struct ib_mad_recv_wc *rmpp_wc; | |
438 | ||
439 | ack_recv(rmpp_recv, rmpp_recv->rmpp_wc); | |
440 | if (rmpp_recv->seg_num > 1) | |
441 | cancel_delayed_work(&rmpp_recv->timeout_work); | |
442 | ||
443 | rmpp_wc = rmpp_recv->rmpp_wc; | |
444 | rmpp_wc->mad_len = get_mad_len(rmpp_recv); | |
445 | /* 10 seconds until we can find the packet lifetime */ | |
446 | queue_delayed_work(rmpp_recv->agent->qp_info->port_priv->wq, | |
447 | &rmpp_recv->cleanup_work, msecs_to_jiffies(10000)); | |
448 | return rmpp_wc; | |
449 | } | |
450 | ||
fa619a77 HR |
451 | static struct ib_mad_recv_wc * |
452 | continue_rmpp(struct ib_mad_agent_private *agent, | |
453 | struct ib_mad_recv_wc *mad_recv_wc) | |
454 | { | |
455 | struct mad_rmpp_recv *rmpp_recv; | |
456 | struct ib_mad_recv_buf *prev_buf; | |
457 | struct ib_mad_recv_wc *done_wc; | |
458 | int seg_num; | |
459 | unsigned long flags; | |
460 | ||
461 | rmpp_recv = acquire_rmpp_recv(agent, mad_recv_wc); | |
462 | if (!rmpp_recv) | |
463 | goto drop1; | |
464 | ||
465 | seg_num = get_seg_num(&mad_recv_wc->recv_buf); | |
466 | ||
467 | spin_lock_irqsave(&rmpp_recv->lock, flags); | |
468 | if ((rmpp_recv->state == RMPP_STATE_TIMEOUT) || | |
469 | (seg_num > rmpp_recv->newwin)) | |
470 | goto drop3; | |
471 | ||
472 | if ((seg_num <= rmpp_recv->last_ack) || | |
473 | (rmpp_recv->state == RMPP_STATE_COMPLETE)) { | |
474 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
475 | ack_recv(rmpp_recv, mad_recv_wc); | |
476 | goto drop2; | |
477 | } | |
478 | ||
479 | prev_buf = find_seg_location(&rmpp_recv->rmpp_wc->rmpp_list, seg_num); | |
480 | if (!prev_buf) | |
481 | goto drop3; | |
482 | ||
483 | done_wc = NULL; | |
484 | list_add(&mad_recv_wc->recv_buf.list, &prev_buf->list); | |
485 | if (rmpp_recv->cur_seg_buf == prev_buf) { | |
486 | update_seg_num(rmpp_recv, &mad_recv_wc->recv_buf); | |
487 | if (get_last_flag(rmpp_recv->cur_seg_buf)) { | |
488 | rmpp_recv->state = RMPP_STATE_COMPLETE; | |
489 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
490 | done_wc = complete_rmpp(rmpp_recv); | |
491 | goto out; | |
492 | } else if (rmpp_recv->seg_num == rmpp_recv->newwin) { | |
493 | rmpp_recv->newwin += window_size(agent); | |
494 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
495 | ack_recv(rmpp_recv, mad_recv_wc); | |
496 | goto out; | |
497 | } | |
498 | } | |
499 | spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
500 | out: | |
501 | deref_rmpp_recv(rmpp_recv); | |
502 | return done_wc; | |
503 | ||
504 | drop3: spin_unlock_irqrestore(&rmpp_recv->lock, flags); | |
505 | drop2: deref_rmpp_recv(rmpp_recv); | |
506 | drop1: ib_free_recv_mad(mad_recv_wc); | |
507 | return NULL; | |
508 | } | |
509 | ||
510 | static struct ib_mad_recv_wc * | |
511 | start_rmpp(struct ib_mad_agent_private *agent, | |
512 | struct ib_mad_recv_wc *mad_recv_wc) | |
513 | { | |
514 | struct mad_rmpp_recv *rmpp_recv; | |
515 | unsigned long flags; | |
516 | ||
517 | rmpp_recv = create_rmpp_recv(agent, mad_recv_wc); | |
518 | if (!rmpp_recv) { | |
519 | ib_free_recv_mad(mad_recv_wc); | |
520 | return NULL; | |
521 | } | |
522 | ||
523 | spin_lock_irqsave(&agent->lock, flags); | |
524 | if (insert_rmpp_recv(agent, rmpp_recv)) { | |
525 | spin_unlock_irqrestore(&agent->lock, flags); | |
526 | /* duplicate first MAD */ | |
527 | destroy_rmpp_recv(rmpp_recv); | |
528 | return continue_rmpp(agent, mad_recv_wc); | |
529 | } | |
530 | atomic_inc(&rmpp_recv->refcount); | |
531 | ||
532 | if (get_last_flag(&mad_recv_wc->recv_buf)) { | |
533 | rmpp_recv->state = RMPP_STATE_COMPLETE; | |
534 | spin_unlock_irqrestore(&agent->lock, flags); | |
535 | complete_rmpp(rmpp_recv); | |
536 | } else { | |
537 | spin_unlock_irqrestore(&agent->lock, flags); | |
538 | /* 40 seconds until we can find the packet lifetimes */ | |
539 | queue_delayed_work(agent->qp_info->port_priv->wq, | |
540 | &rmpp_recv->timeout_work, | |
541 | msecs_to_jiffies(40000)); | |
542 | rmpp_recv->newwin += window_size(agent); | |
543 | ack_recv(rmpp_recv, mad_recv_wc); | |
544 | mad_recv_wc = NULL; | |
545 | } | |
546 | deref_rmpp_recv(rmpp_recv); | |
547 | return mad_recv_wc; | |
548 | } | |
549 | ||
fa619a77 HR |
550 | static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr) |
551 | { | |
552 | struct ib_rmpp_mad *rmpp_mad; | |
553 | int timeout; | |
f36e1793 | 554 | u32 paylen = 0; |
fa619a77 | 555 | |
34816ad9 | 556 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 | 557 | ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
f36e1793 | 558 | rmpp_mad->rmpp_hdr.seg_num = cpu_to_be32(++mad_send_wr->seg_num); |
fa619a77 HR |
559 | |
560 | if (mad_send_wr->seg_num == 1) { | |
561 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_FIRST; | |
f36e1793 | 562 | paylen = mad_send_wr->send_buf.seg_count * IB_MGMT_RMPP_DATA - |
972d512a | 563 | mad_send_wr->pad; |
fa619a77 HR |
564 | } |
565 | ||
f36e1793 | 566 | if (mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 567 | rmpp_mad->rmpp_hdr.rmpp_rtime_flags |= IB_MGMT_RMPP_FLAG_LAST; |
972d512a | 568 | paylen = IB_MGMT_RMPP_DATA - mad_send_wr->pad; |
fa619a77 | 569 | } |
f36e1793 | 570 | rmpp_mad->rmpp_hdr.paylen_newwin = cpu_to_be32(paylen); |
fa619a77 HR |
571 | |
572 | /* 2 seconds for an ACK until we can find the packet lifetime */ | |
34816ad9 | 573 | timeout = mad_send_wr->send_buf.timeout_ms; |
fa619a77 HR |
574 | if (!timeout || timeout > 2000) |
575 | mad_send_wr->timeout = msecs_to_jiffies(2000); | |
f36e1793 | 576 | |
fa619a77 HR |
577 | return ib_send_mad(mad_send_wr); |
578 | } | |
579 | ||
fa9656bb JM |
580 | static void abort_send(struct ib_mad_agent_private *agent, |
581 | struct ib_mad_recv_wc *mad_recv_wc, u8 rmpp_status) | |
fe9e08e1 SH |
582 | { |
583 | struct ib_mad_send_wr_private *mad_send_wr; | |
584 | struct ib_mad_send_wc wc; | |
585 | unsigned long flags; | |
586 | ||
587 | spin_lock_irqsave(&agent->lock, flags); | |
fa9656bb | 588 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
fe9e08e1 SH |
589 | if (!mad_send_wr) |
590 | goto out; /* Unmatched send */ | |
591 | ||
f36e1793 | 592 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
fe9e08e1 SH |
593 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
594 | goto out; /* Send is already done */ | |
595 | ||
596 | ib_mark_mad_done(mad_send_wr); | |
597 | spin_unlock_irqrestore(&agent->lock, flags); | |
598 | ||
599 | wc.status = IB_WC_REM_ABORT_ERR; | |
600 | wc.vendor_err = rmpp_status; | |
34816ad9 | 601 | wc.send_buf = &mad_send_wr->send_buf; |
fe9e08e1 SH |
602 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
603 | return; | |
604 | out: | |
605 | spin_unlock_irqrestore(&agent->lock, flags); | |
606 | } | |
607 | ||
f36e1793 JM |
608 | static inline void adjust_last_ack(struct ib_mad_send_wr_private *wr, |
609 | int seg_num) | |
610 | { | |
611 | struct list_head *list; | |
612 | ||
613 | wr->last_ack = seg_num; | |
614 | list = &wr->last_ack_seg->list; | |
615 | list_for_each_entry(wr->last_ack_seg, list, list) | |
616 | if (wr->last_ack_seg->num == seg_num) | |
617 | break; | |
618 | } | |
619 | ||
75ab1344 SH |
620 | static void process_ds_ack(struct ib_mad_agent_private *agent, |
621 | struct ib_mad_recv_wc *mad_recv_wc, int newwin) | |
622 | { | |
623 | struct mad_rmpp_recv *rmpp_recv; | |
624 | ||
625 | rmpp_recv = find_rmpp_recv(agent, mad_recv_wc); | |
626 | if (rmpp_recv && rmpp_recv->state == RMPP_STATE_COMPLETE) | |
627 | rmpp_recv->repwin = newwin; | |
628 | } | |
629 | ||
fa619a77 HR |
630 | static void process_rmpp_ack(struct ib_mad_agent_private *agent, |
631 | struct ib_mad_recv_wc *mad_recv_wc) | |
632 | { | |
633 | struct ib_mad_send_wr_private *mad_send_wr; | |
634 | struct ib_rmpp_mad *rmpp_mad; | |
635 | unsigned long flags; | |
636 | int seg_num, newwin, ret; | |
637 | ||
638 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
fe9e08e1 | 639 | if (rmpp_mad->rmpp_hdr.rmpp_status) { |
fa9656bb | 640 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 | 641 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fa619a77 | 642 | return; |
fe9e08e1 | 643 | } |
fa619a77 HR |
644 | |
645 | seg_num = be32_to_cpu(rmpp_mad->rmpp_hdr.seg_num); | |
646 | newwin = be32_to_cpu(rmpp_mad->rmpp_hdr.paylen_newwin); | |
fe9e08e1 | 647 | if (newwin < seg_num) { |
fa9656bb | 648 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
fe9e08e1 SH |
649 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_W2S); |
650 | return; | |
651 | } | |
fa619a77 HR |
652 | |
653 | spin_lock_irqsave(&agent->lock, flags); | |
fa9656bb | 654 | mad_send_wr = ib_find_send_mad(agent, mad_recv_wc); |
75ab1344 SH |
655 | if (!mad_send_wr) { |
656 | if (!seg_num) | |
657 | process_ds_ack(agent, mad_recv_wc, newwin); | |
658 | goto out; /* Unmatched or DS RMPP ACK */ | |
659 | } | |
660 | ||
661 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) && | |
662 | (mad_send_wr->timeout)) { | |
663 | spin_unlock_irqrestore(&agent->lock, flags); | |
664 | ack_ds_ack(agent, mad_recv_wc); | |
665 | return; /* Repeated ACK for DS RMPP transaction */ | |
666 | } | |
fa619a77 | 667 | |
f36e1793 | 668 | if ((mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) || |
fa619a77 HR |
669 | (!mad_send_wr->timeout) || (mad_send_wr->status != IB_WC_SUCCESS)) |
670 | goto out; /* Send is already done */ | |
671 | ||
f36e1793 JM |
672 | if (seg_num > mad_send_wr->send_buf.seg_count || |
673 | seg_num > mad_send_wr->newwin) { | |
fe9e08e1 | 674 | spin_unlock_irqrestore(&agent->lock, flags); |
fa9656bb | 675 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
fe9e08e1 SH |
676 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_S2B); |
677 | return; | |
678 | } | |
fa619a77 HR |
679 | |
680 | if (newwin < mad_send_wr->newwin || seg_num < mad_send_wr->last_ack) | |
681 | goto out; /* Old ACK */ | |
682 | ||
683 | if (seg_num > mad_send_wr->last_ack) { | |
f36e1793 | 684 | adjust_last_ack(mad_send_wr, seg_num); |
34816ad9 | 685 | mad_send_wr->retries = mad_send_wr->send_buf.retries; |
fa619a77 HR |
686 | } |
687 | mad_send_wr->newwin = newwin; | |
f36e1793 | 688 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 689 | /* If no response is expected, the ACK completes the send */ |
34816ad9 | 690 | if (!mad_send_wr->send_buf.timeout_ms) { |
fa619a77 HR |
691 | struct ib_mad_send_wc wc; |
692 | ||
693 | ib_mark_mad_done(mad_send_wr); | |
694 | spin_unlock_irqrestore(&agent->lock, flags); | |
695 | ||
696 | wc.status = IB_WC_SUCCESS; | |
697 | wc.vendor_err = 0; | |
34816ad9 | 698 | wc.send_buf = &mad_send_wr->send_buf; |
fa619a77 HR |
699 | ib_mad_complete_send_wr(mad_send_wr, &wc); |
700 | return; | |
701 | } | |
702 | if (mad_send_wr->refcount == 1) | |
34816ad9 SH |
703 | ib_reset_mad_timeout(mad_send_wr, |
704 | mad_send_wr->send_buf.timeout_ms); | |
75ab1344 SH |
705 | spin_unlock_irqrestore(&agent->lock, flags); |
706 | ack_ds_ack(agent, mad_recv_wc); | |
707 | return; | |
fa619a77 HR |
708 | } else if (mad_send_wr->refcount == 1 && |
709 | mad_send_wr->seg_num < mad_send_wr->newwin && | |
f36e1793 | 710 | mad_send_wr->seg_num < mad_send_wr->send_buf.seg_count) { |
fa619a77 HR |
711 | /* Send failure will just result in a timeout/retry */ |
712 | ret = send_next_seg(mad_send_wr); | |
713 | if (ret) | |
714 | goto out; | |
715 | ||
716 | mad_send_wr->refcount++; | |
179e0917 | 717 | list_move_tail(&mad_send_wr->agent_list, |
fa619a77 HR |
718 | &mad_send_wr->mad_agent_priv->send_list); |
719 | } | |
720 | out: | |
721 | spin_unlock_irqrestore(&agent->lock, flags); | |
722 | } | |
723 | ||
fe9e08e1 SH |
724 | static struct ib_mad_recv_wc * |
725 | process_rmpp_data(struct ib_mad_agent_private *agent, | |
726 | struct ib_mad_recv_wc *mad_recv_wc) | |
727 | { | |
728 | struct ib_rmpp_hdr *rmpp_hdr; | |
729 | u8 rmpp_status; | |
730 | ||
731 | rmpp_hdr = &((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr; | |
732 | ||
733 | if (rmpp_hdr->rmpp_status) { | |
734 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_STATUS; | |
735 | goto bad; | |
736 | } | |
737 | ||
738 | if (rmpp_hdr->seg_num == __constant_htonl(1)) { | |
739 | if (!(ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST)) { | |
740 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; | |
741 | goto bad; | |
742 | } | |
743 | return start_rmpp(agent, mad_recv_wc); | |
744 | } else { | |
745 | if (ib_get_rmpp_flags(rmpp_hdr) & IB_MGMT_RMPP_FLAG_FIRST) { | |
746 | rmpp_status = IB_MGMT_RMPP_STATUS_BAD_SEG; | |
747 | goto bad; | |
748 | } | |
749 | return continue_rmpp(agent, mad_recv_wc); | |
750 | } | |
751 | bad: | |
752 | nack_recv(agent, mad_recv_wc, rmpp_status); | |
753 | ib_free_recv_mad(mad_recv_wc); | |
754 | return NULL; | |
755 | } | |
756 | ||
757 | static void process_rmpp_stop(struct ib_mad_agent_private *agent, | |
758 | struct ib_mad_recv_wc *mad_recv_wc) | |
759 | { | |
760 | struct ib_rmpp_mad *rmpp_mad; | |
761 | ||
762 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
763 | ||
764 | if (rmpp_mad->rmpp_hdr.rmpp_status != IB_MGMT_RMPP_STATUS_RESX) { | |
fa9656bb | 765 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 SH |
766 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
767 | } else | |
fa9656bb | 768 | abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
fe9e08e1 SH |
769 | } |
770 | ||
771 | static void process_rmpp_abort(struct ib_mad_agent_private *agent, | |
772 | struct ib_mad_recv_wc *mad_recv_wc) | |
773 | { | |
774 | struct ib_rmpp_mad *rmpp_mad; | |
775 | ||
776 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
777 | ||
778 | if (rmpp_mad->rmpp_hdr.rmpp_status < IB_MGMT_RMPP_STATUS_ABORT_MIN || | |
779 | rmpp_mad->rmpp_hdr.rmpp_status > IB_MGMT_RMPP_STATUS_ABORT_MAX) { | |
fa9656bb | 780 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
fe9e08e1 SH |
781 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BAD_STATUS); |
782 | } else | |
fa9656bb | 783 | abort_send(agent, mad_recv_wc, rmpp_mad->rmpp_hdr.rmpp_status); |
fe9e08e1 SH |
784 | } |
785 | ||
fa619a77 HR |
786 | struct ib_mad_recv_wc * |
787 | ib_process_rmpp_recv_wc(struct ib_mad_agent_private *agent, | |
788 | struct ib_mad_recv_wc *mad_recv_wc) | |
789 | { | |
790 | struct ib_rmpp_mad *rmpp_mad; | |
791 | ||
792 | rmpp_mad = (struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad; | |
793 | if (!(rmpp_mad->rmpp_hdr.rmpp_rtime_flags & IB_MGMT_RMPP_FLAG_ACTIVE)) | |
794 | return mad_recv_wc; | |
795 | ||
fe9e08e1 | 796 | if (rmpp_mad->rmpp_hdr.rmpp_version != IB_MGMT_RMPP_VERSION) { |
fa9656bb | 797 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
fe9e08e1 | 798 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_UNV); |
fa619a77 | 799 | goto out; |
fe9e08e1 | 800 | } |
fa619a77 HR |
801 | |
802 | switch (rmpp_mad->rmpp_hdr.rmpp_type) { | |
803 | case IB_MGMT_RMPP_TYPE_DATA: | |
fe9e08e1 | 804 | return process_rmpp_data(agent, mad_recv_wc); |
fa619a77 HR |
805 | case IB_MGMT_RMPP_TYPE_ACK: |
806 | process_rmpp_ack(agent, mad_recv_wc); | |
807 | break; | |
808 | case IB_MGMT_RMPP_TYPE_STOP: | |
fe9e08e1 SH |
809 | process_rmpp_stop(agent, mad_recv_wc); |
810 | break; | |
fa619a77 | 811 | case IB_MGMT_RMPP_TYPE_ABORT: |
fe9e08e1 | 812 | process_rmpp_abort(agent, mad_recv_wc); |
fa619a77 HR |
813 | break; |
814 | default: | |
fa9656bb | 815 | abort_send(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
fe9e08e1 | 816 | nack_recv(agent, mad_recv_wc, IB_MGMT_RMPP_STATUS_BADT); |
fa619a77 HR |
817 | break; |
818 | } | |
819 | out: | |
820 | ib_free_recv_mad(mad_recv_wc); | |
821 | return NULL; | |
822 | } | |
823 | ||
75ab1344 SH |
824 | static int init_newwin(struct ib_mad_send_wr_private *mad_send_wr) |
825 | { | |
826 | struct ib_mad_agent_private *agent = mad_send_wr->mad_agent_priv; | |
827 | struct ib_mad_hdr *mad_hdr = mad_send_wr->send_buf.mad; | |
828 | struct mad_rmpp_recv *rmpp_recv; | |
829 | struct ib_ah_attr ah_attr; | |
830 | unsigned long flags; | |
831 | int newwin = 1; | |
832 | ||
833 | if (!(mad_hdr->method & IB_MGMT_METHOD_RESP)) | |
834 | goto out; | |
835 | ||
836 | spin_lock_irqsave(&agent->lock, flags); | |
837 | list_for_each_entry(rmpp_recv, &agent->rmpp_list, list) { | |
838 | if (rmpp_recv->tid != mad_hdr->tid || | |
839 | rmpp_recv->mgmt_class != mad_hdr->mgmt_class || | |
840 | rmpp_recv->class_version != mad_hdr->class_version || | |
841 | (rmpp_recv->method & IB_MGMT_METHOD_RESP)) | |
842 | continue; | |
843 | ||
844 | if (ib_query_ah(mad_send_wr->send_buf.ah, &ah_attr)) | |
845 | continue; | |
846 | ||
847 | if (rmpp_recv->slid == ah_attr.dlid) { | |
848 | newwin = rmpp_recv->repwin; | |
849 | break; | |
850 | } | |
851 | } | |
852 | spin_unlock_irqrestore(&agent->lock, flags); | |
853 | out: | |
854 | return newwin; | |
855 | } | |
856 | ||
fa619a77 HR |
857 | int ib_send_rmpp_mad(struct ib_mad_send_wr_private *mad_send_wr) |
858 | { | |
859 | struct ib_rmpp_mad *rmpp_mad; | |
f36e1793 | 860 | int ret; |
fa619a77 | 861 | |
34816ad9 | 862 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
863 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
864 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
865 | return IB_RMPP_RESULT_UNHANDLED; | |
866 | ||
f36e1793 JM |
867 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) { |
868 | mad_send_wr->seg_num = 1; | |
fa619a77 | 869 | return IB_RMPP_RESULT_INTERNAL; |
f36e1793 | 870 | } |
fa619a77 | 871 | |
75ab1344 | 872 | mad_send_wr->newwin = init_newwin(mad_send_wr); |
fa619a77 HR |
873 | |
874 | /* We need to wait for the final ACK even if there isn't a response */ | |
875 | mad_send_wr->refcount += (mad_send_wr->timeout == 0); | |
876 | ret = send_next_seg(mad_send_wr); | |
877 | if (!ret) | |
878 | return IB_RMPP_RESULT_CONSUMED; | |
879 | return ret; | |
880 | } | |
881 | ||
882 | int ib_process_rmpp_send_wc(struct ib_mad_send_wr_private *mad_send_wr, | |
883 | struct ib_mad_send_wc *mad_send_wc) | |
884 | { | |
885 | struct ib_rmpp_mad *rmpp_mad; | |
fa619a77 HR |
886 | int ret; |
887 | ||
34816ad9 | 888 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
889 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
890 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
891 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ | |
892 | ||
34816ad9 | 893 | if (rmpp_mad->rmpp_hdr.rmpp_type != IB_MGMT_RMPP_TYPE_DATA) |
fa619a77 | 894 | return IB_RMPP_RESULT_INTERNAL; /* ACK, STOP, or ABORT */ |
fa619a77 HR |
895 | |
896 | if (mad_send_wc->status != IB_WC_SUCCESS || | |
897 | mad_send_wr->status != IB_WC_SUCCESS) | |
898 | return IB_RMPP_RESULT_PROCESSED; /* Canceled or send error */ | |
899 | ||
900 | if (!mad_send_wr->timeout) | |
901 | return IB_RMPP_RESULT_PROCESSED; /* Response received */ | |
902 | ||
f36e1793 | 903 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) { |
fa619a77 | 904 | mad_send_wr->timeout = |
34816ad9 | 905 | msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
fa619a77 HR |
906 | return IB_RMPP_RESULT_PROCESSED; /* Send done */ |
907 | } | |
908 | ||
f36e1793 JM |
909 | if (mad_send_wr->seg_num == mad_send_wr->newwin || |
910 | mad_send_wr->seg_num == mad_send_wr->send_buf.seg_count) | |
fa619a77 HR |
911 | return IB_RMPP_RESULT_PROCESSED; /* Wait for ACK */ |
912 | ||
913 | ret = send_next_seg(mad_send_wr); | |
914 | if (ret) { | |
915 | mad_send_wc->status = IB_WC_GENERAL_ERR; | |
916 | return IB_RMPP_RESULT_PROCESSED; | |
917 | } | |
918 | return IB_RMPP_RESULT_CONSUMED; | |
919 | } | |
920 | ||
921 | int ib_retry_rmpp(struct ib_mad_send_wr_private *mad_send_wr) | |
922 | { | |
923 | struct ib_rmpp_mad *rmpp_mad; | |
924 | int ret; | |
925 | ||
34816ad9 | 926 | rmpp_mad = mad_send_wr->send_buf.mad; |
fa619a77 HR |
927 | if (!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
928 | IB_MGMT_RMPP_FLAG_ACTIVE)) | |
929 | return IB_RMPP_RESULT_UNHANDLED; /* RMPP not active */ | |
930 | ||
f36e1793 | 931 | if (mad_send_wr->last_ack == mad_send_wr->send_buf.seg_count) |
fa619a77 HR |
932 | return IB_RMPP_RESULT_PROCESSED; |
933 | ||
f36e1793 JM |
934 | mad_send_wr->seg_num = mad_send_wr->last_ack; |
935 | mad_send_wr->cur_seg = mad_send_wr->last_ack_seg; | |
936 | ||
fa619a77 HR |
937 | ret = send_next_seg(mad_send_wr); |
938 | if (ret) | |
939 | return IB_RMPP_RESULT_PROCESSED; | |
940 | ||
941 | return IB_RMPP_RESULT_CONSUMED; | |
942 | } |